It tells you how far away from the eyepiece your eyes can be while still being able to enjoy the full field of view that the binoculars offer. The eye relief number on binoculars is mostly important only if you wear glasses. The only outward indication that it is indeed a Nikon SUPERIOR E model is the SE printed on the LESS THAN SUPERIOR cheap cardboard box it arrived it. Of course there is the serial number, but that's it. I like Amazon because they use Nikons model numbers. Where Is The Serial Number On Nikon Monarch Binoculars Where Is The Serial Number On Nikon Monarch BinocularsShop Cabela's selection of binoculars. Serial Number Nikon Cameras Serial Number Lookup Warranty Nikon Binocular Serial Number Lookup. And third, the company backs their bins with a lifetime replacement warranty against defects and lifetime no-cost repairs if you damage them by accident during normal use. Nikon Binocular Serial Number Lookup 2327976. A good example is my new Nikon 10 x 42 SE, on which there is only the word Nikon in gold lettering, alongside 10 x 42 and 6. The new Nikon MONARCH binoculars feature the latest optical technology for a brighter view at dusk and dawn. Secondly, the argon-purged chamber helps protect the binoculars against water damage and prevents fogging, one of the most common issues with binoculars. But this pair also has an ESP dielectric coating, which simply means the lenses deliver excellent contrast and color fidelity, helping you see the often-minute patterns and hues on a bird’s feathers. I know what you’re thinking - these bins have the exact same magnification and lens diameter as the pair we discussed earlier, so why are they twice the price? First off, 8x42 is a great combo popular with many brands that magnification and lens diameter pairing allows for a good field of view that’s ideal for seeing deep into dark forests, tracking birds across the sky, or watching parades and football games. The Nikon F camera was produced between March 1959 and October 1973.